51(1) Whole number arithmetic and its teaching and learning
Eds.: Xuhua Sun, Hamsa Venkat, Jarmila Novotna, Rongjin Huang

51(2) Material ecologies of teaching and learning
Eds.: Elizabeth de Freitas, Nathalie Sinclair, Lulu Healy

51(3) Identity in Mathematical Education
Eds.: Mellony Graven, Einat Heyd- Metzuyanim

51(4) Metacognition in mathematics education
Ed.: Annemie Desoete

51(5) Mathematical Evidence and Argument
Eds.: Andrew Aberdein, Christine Knipping, Maria Alessandra Mariotti
51(6) 21st Century Skills and STEM Teaching and Learning
Eds.: Katja Maaß, Michiel Doorman, Vince Geiger, Merrilyn Goos
51(7) Research on Teaching and Learning in Linear Algebra
Eds.: Sepideh Stewart, Christine Andrews- Larson, Michelle Zandieh

Issues in 2020

52(1) Mathematical word problem solving: Psychological and educational perspectives
Eds.: Lieven Verschaffel, Stanislaw Schukajlow, Jon Star, Wim Van Dooren

52(2) Numeracy and vulnerability in adult life
Eds.: Iddo Gal, Anke Grotlüschen, Gabriele Kaiser

52(3) Expertise to develop students' expertise in mathematics: Bridging teachers' professional knowledge and instructional quality
Eds.: Fien Depaepe, Jon Star, Lieven Verschaffel

52(4) Research on Early Childhood Mathematics Teaching and Learning
Eds.: Camilla Björklund, Angelika Kullberg, Marja van den Heuvel-Panhuizen

52(5) Online mathematics education and e-learning
Eds.: Johann Engelbrecht, Salvador Llinares, Marcelo Borba

52(6) The Role of Mathematicians’ Practice in Mathematics Education Research
Eds.: Keith Weber, Paul Dawkins

52(7) Teaching with Digital Technology
Eds.: Alison Clark-Wilson, Ornella Robutti, Mike Thomas

Issues in 2021

53(1) Mathematics Teacher Noticing: Exploring and Expanding the Terrain
Eds.: Jaguthsing Dindyal, Edna O. Schack, Ban Heng Choy, Miriam G. Sherin

53(2) Calculus in High School and College Around the World
Eds.: Patrick Thompson, Guershon Harel

53(3) Designing and enacting teaching that supports language in mathematics classrooms
Eds.: Susanna Prediger, Kirstin Erath, Jenni Ingram, Judit Moschkovich

53(4) Empirical Research on Mathematical Problem Solving and Problem Posing around the World
Eds.: Peter Liljedahl, Jinfa Cai
53(5) Implementation and implementability of mathematics educations research 
Eds.: Boris Koichu, Mario Sánchez Aguilar, Morten Misfeldt
53(6) To be announced 

53(7) Eastern European Mathematics Education in the Decades of Change
Eds.: Alexander Karp

Issues in 2022
54 (1) Mathematical Creativity – State-of-the-art of Empirical Research
Eds.: Roza Leikin, Bharath Sriraman